From: Ian Rogers <irogers@google.com> Refactor test to better enable sharing of logic, to give an idea of progress and introduce test functions. Add test of measuring both cycles and cycles:b simultaneously. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Song Liu <song@kernel.org> Cc: Thomas Richter <tmricht@linux.ibm.com> Link: https://lore.kernel.org/r/20240416170014.985191-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/tests/shell/stat_bpf_counters.sh | 67 ++++++++++++++++----- 1 file changed, 52 insertions(+), 15 deletions(-) diff --git a/tools/perf/tests/shell/stat_bpf_counters.sh b/tools/perf/tests/shell/stat_bpf_counters.sh index 22eb31e48ca7..3b594ea51b51 100755 --- a/tools/perf/tests/shell/stat_bpf_counters.sh +++ b/tools/perf/tests/shell/stat_bpf_counters.sh @@ -4,28 +4,65 @@ set -e +workload="perf bench sched messaging -g 1 -l 100 -t" + # check whether $2 is within +/- 10% of $1 compare_number() { - first_num=$1 - second_num=$2 - - # upper bound is first_num * 110% - upper=$(( $first_num + $first_num / 10 )) - # lower bound is first_num * 90% - lower=$(( $first_num - $first_num / 10 )) - - if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then - echo "The difference between $first_num and $second_num are greater than 10%." - exit 1 - fi + first_num=$1 + second_num=$2 + + # upper bound is first_num * 120% + upper=$(expr $first_num + $first_num / 5 ) + # lower bound is first_num * 80% + lower=$(expr $first_num - $first_num / 5 ) + + if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then + echo "The difference between $first_num and $second_num are greater than 20%." + exit 1 + fi +} + +check_counts() +{ + base_cycles=$1 + bpf_cycles=$2 + + if [ "$base_cycles" = "<not" ]; then + echo "Skipping: cycles event not counted" + exit 2 + fi + if [ "$bpf_cycles" = "<not" ]; then + echo "Failed: cycles not counted with --bpf-counters" + exit 1 + fi +} + +test_bpf_counters() +{ + printf "Testing --bpf-counters " + base_cycles=$(perf stat --no-big-num -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') + bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- $workload 2>&1 | awk '/cycles/ {print $1}') + check_counts $base_cycles $bpf_cycles + compare_number $base_cycles $bpf_cycles + echo "[Success]" +} + +test_bpf_modifier() +{ + printf "Testing bpf event modifier " + stat_output=$(perf stat --no-big-num -e cycles/name=base_cycles/,cycles/name=bpf_cycles/b -- $workload 2>&1) + base_cycles=$(echo "$stat_output"| awk '/base_cycles/ {print $1}') + bpf_cycles=$(echo "$stat_output"| awk '/bpf_cycles/ {print $1}') + check_counts $base_cycles $bpf_cycles + compare_number $base_cycles $bpf_cycles + echo "[Success]" } # skip if --bpf-counters is not supported perf stat --bpf-counters true > /dev/null 2>&1 || exit 2 -base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') -bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}') +test_bpf_counters +test_bpf_modifier -compare_number $base_cycles $bpf_cycles exit 0 -- 2.34.1